WW-07400     Reviewed 2008  

When is a field dry enough to plant or harvest? Every farmer faces the dilemma of balancing the need for timely planting and harvest against the long-term compaction damage caused by driving on wet soil. The consequences of this decision are becoming more and more serious as equipment becomes heavier and technology allows operation in wetter soil conditions.

Why is compaction such a concern?

Even if your soil has enough nutrients, plants will grow poorly if they cannot reach the nutrients or get enough air and water. Yields are lower and input costs may be higher on compacted soils because they:

• are harder for roots and seedlings to grow through. Poor root development means plants are more likely to be stressed by dry, wet, or low fertility conditions.
• drain more slowly in the spring or after heavy rains.
• hold less water.
• are a poorer environment for the soil organisms that cycle nutrients.

Are you doing all you can to avoid compaction risks?

Subsoil compaction is difficult or impossible to treat, so prevention is essential. This publication will discuss your options.

The effects of surface compaction
Notice the slow emergence of sugar beet seedlings in the tire tracks of the last tillage operation.

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